A book is a souvenir of an idea.

Gifts are not favors. If you expect something in return, it's not a gift.

In the long run, doing work that's important leads to more happiness than doing work that's merely profitable.

In fact, most of the time, people with similar information, similar beliefs and similar apparent choices will choose similar actions. So if you want to know why someone does what they do, start with what they know, what they believe and where they came from. Dismissing actions we don't admire merely because we don't care enough to have empathy is rarely going to help us make the change we seek. It doesn't help us understand, and it creates a gulf that drives us apart.

Products that are remarkable get talked about.

Just because something is easy to measure doesn't mean it's important.

When you think about Uber and Airbnb and the other companies that are turning things upside down, Uber isn't big 'cause they ran a lot of ads. They're big because someone took out their iPhone and said to their friend, watch this, and pressed a button and a car pulled up.